•To make a low, prolonged sound, like that of a bee in flight; to drone; to murmur; to buzz; as, a top hums.•To make a nasal sound, like that of the letter m prolonged, without opening the mouth, or articulating; to mumble in monotonous undertone; to drone.•To make an inarticulate sound, like h'm, through the nose in the process of speaking, from embarrassment or a affectation; to hem.•To express satisfaction by a humming noise.•To have the sensation of a humming noise; as, my head hums, -- a pathological condition.•To sing with shut mouth; to murmur without articulation; to mumble; as, to hum a tune.•To express satisfaction with by humming.•To flatter by approving; to cajole; to impose on; to humbug.•A low monotonous noise, as of bees in flight, of a swiftly revolving top, of a wheel, or the like; a drone; a buzz.•Any inarticulate and buzzing sound•The confused noise of a crowd or of machinery, etc., heard at a distance; as, the hum of industry.•A buzz or murmur, as of approbation.•An imposition or hoax.•An inarticulate nasal sound or murmur, like h'm, uttered by a speaker in pause from embarrassment, affectation, etc.•A kind of strong drink formerly used.•Ahem; hem; an inarticulate sound uttered in a pause of speech implying doubt and deliberation.

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